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explain participation constraints with examples
What is a transaction ? The Transaction is a unit of data processing. For instance, many of the transactions at a bank may be withdrawal or deposit of money; transfer of money f
How external/conceptual mapping and conceptual /internal mapping is performed
design a generalization specialization hierarchy for a motor vehicle sales company. the company sells motorcycles, passenger cars, vens and buses.
Give two profit of Reuse of Code. Reusing the implementation . Place existing class directly inside a new class. The new class can be made up of any number and type of the oth
what benefit can a company gain by managing its own infrasture and services
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
This project will involve designing and creating a database for an organization. In the design of a database, there is no single "perfect" design. So your database design may not
explain cascading rollback
Relational Model: The relational model uses a collection of tables to represent both data and the relationships among those data. Each table has multiple columns and each column h
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